Same deployment as v0.6.0, just to fix CI script and bump to v0.6.1

Features:
- Report IP to AbuseIPDB (https://www.abuseipdb.com/)
- Support simple shell interpret (#32)
- Add filesize limit for scp/sftp upload (#20)
- Add config param server.allowRetryLogin , server.retryDelay
- Add cmdOutput - associate text file content to command output in fake shell.
- Add lspci and lscpu

Bugfixs:
- Eliminate prompt when user use command "exit" in terminal

Enhancements:
- Refactor and clean up much of the code. Move ssh-related logic to separate package rather than syrup/main
- Make config param names more consistent
- Switch default config format to YAML

Deployment/Documentation:
- Compile with Go 1.11 along with go module
- Rewrite Dockerfile, Travis CI script
- Update documentation

v0.5.0

Addh shell lexer, add various commands

v0.4.0

• SCP support
• Support pushing activities to Elasticsearch
• Add rate limiter to limit speed
• Add function to delay processing of client commands. With the option above combined can make your server as slow as possible!
• Add/updated commands
• Switch to use Viper for configuration
• Hostname now become modifiable through configuration

0.4.0

Switch to viper for config, add SCP support, add rate limiter and ran…

0.0.3

Add SFTP for upload/download, proper command panic handling,

0.0.2

Add ls and pwd command

First build from Travis CI

First automatic build from Travis CI.